The JavaScript Array includes() method checks whether an array includes a specified value, returning true or false accordingly. It takes one argument, the value to search for, and optionally an index to start the search from. If the value is found, the method returns true, otherwise it returns false. The includes() method performs a strict equality check (===), so the type of the value being searched for must match the type of the values in the array. This method is useful for checking if an array contains a particular value before performing further operations on the array. To know more about the JavaScript Array includes method connect at the website.